Igniter tip and hood



Oct. 5 1926. 1,601,863

0. J. LEINS IGNITER TIP AND HOOD Original Filed Dec. 12. 1923 Patented Oct. 5, 192 6.

UNITED STATES OSCAR J'. LEINS, -OF -MILWAUKEE, WISCONSIN, ASSIGNOR TO MILWAUKEE GAS SPECIALTY COMPANY, OF MILWAUKEE, WISCONSIN, A CORPORATION OF WIS- CONSIN.

Original application filed December 12, 1923, Serial No. 680,185. Divided and this application filed December 7, 1925.

This invention relatesto an improved ti and hood for flash igniters and the like, an its object is the provision of a generally 1mproved and simplified construction that may be economically produced and in which the flame is protected against being accidentally blown out or extinguished and the air supply directed along the axis orin the direction. of issuance of the stream from the et itself.

The present invention is a division of my copending application, Serial No. 680,185, filed December 12, 1923.

The invention is illustrated in the accompanying drawings, in which Fig. 1 is a top plan View of an 1gn1ter embodying the present invention, illustrating diagrammatically its disposition with respect to the burners of a stove;' and Fig. 2 is a longitudinal detail section taken on the line 22 of Fig. 1.

Referring to the drawings, the igniter shown comprises, in general, a threaded nipple 5 adapted to be threaded .into the fuel supply pipe 6, which may be the gas 511 l i e for the ani gl salve means 7 igniter tube 8 and firing head 9.

The firing head 9 to which the present invention is particularly directed, comprises a nozzle 10 which may be enlarged at its in ner end 11 to provide a socket thread-ed at 12 upon the outer end of the tube The jet or tip 10 has a tapered outlet 13 into the larger end of which the outer end of the tube 8 opens. The fuel outlet passageway 18 diminishes outwardly in cross-section and the reduced outer end opens from the nozzle 10 within a hood 15. A relatively small light may normally issue from the nozzle 10 and by increasing the fuel supply to the firing head or tip. a relatively long flame may be projected therefrom.

The hood 15 surrounds the nozzle 10 and protects the pilot light from being blown out or accidentally extinguished by currents of air and from dead gasses from the burners of the stove or range. The hood 15 may be of generally cylindrical formation, as shown, and it has an open outer end 16 and its opposit-e end has a wa1l'17 tapered or inclined toward the axis of the nozzle 10 and mer ing into a radially extending wall 18 whic may have an opening 19 for receiving the stove or range, for ex- Serial No. 73,632.

nozzle 10. The outer end of the enlarged portion 11 may be reduced slightly to fit t ghtly in the opening 19 and the joint between the wall 18 of the hood 15 and the nozzle 10 may be welded, or the hood ma be otherwise secured to the nozzle or forme integral therewith. 1

A plurality of air inlet openings 20 are provided through the inclinedor obli ue wall 17 at the base of the hood 15 and t c axis of these openings 20 are inclined or converged toward the axis of the nozzle 10. These openings 20 admit air for proper combustion of the fuel issuing from the nozzle 10. The tapered nozzle part of the tip extends outwardly beyond the base of the hood 15 with its outer end outwardly or forwardly beyond the air openings 20 and the oblique disposition of the openings 20 directs the air supply along the axis of the nozzle 10 just forward of the discharge end of the jet and within the hood 15. This assures proper maintenance of the small or singly burning pilot light and also proper combustion of the projected stream, without distorting the same and the disposition of the openings 20 in the tapered or oblique portion or base of the hood 15 permits a maximum size ofsaid openings relative the diameter of the hood.

The mounting or disposition of the base of the hood rearwardly or inwardly from the outer end of the-nozzle 1O disposes the openings 20 rearwardly or inwardly of the outlet end of the nozzle 10 so that the air is directed along the axis of the nozzle 10 and not directly acrossthe axis of the outer end of the nozzle. Distortion of the projected-stream is thus avoided, as already pointed out, and there is no hindrance or impeding of the projection of the stream by th air supply, even where the air enters through the openings 20 in a draft or gust. Under such conditions, the projection of the stream will be aided rather thanimpaire'd or impeded. The external periphery of the enlarged end 11 of the nozzle 10 may be of non-circular formation, as shown, to facilitate engagement by a suitable tool in threadmg the nozzle upon and removing it from the outer end of the tube 8. The hood 15 and nozzle 10 may be removed from and replaced upon'the outer end of the tube 8 as a unit.

The connections between the supply pipe 6 and the igniter tube 8 and the valve means 7 form no part-of the present invention and may be varied, as desired, and the firing head 9 with its nozzle and hood arrangement may be embodied in other types of igniters. The particular structure shown, is the one to which the application of which this is a division is directed. Therefore, sufiice it here to say that the valve means 7 comprises a valve casing having a conical bore in which the conical part of the plug 26 is seated. The adjacent end of the igniter tube 8 is threaded into the plug 26 and the interior of the plug opens into the tube 8 through a passageway 27. The nipple 5 extends from the valve shell or casing 25 and has a passageway 28 connecting the interior of the pipe 6 with the well 29 in the casing 25 from which the fuel normally passes through ducts or passageways 30, restricted by-pass passageway 31, the interior of the stem 33, ports 34, ports and passageway 27 to and through the tube 8 and issues in a normally restricted flow from the nozzle 10 to maintain a relatively small pilot light normally at the outlet end of the nozzle 10 and within the hood 15.

The size of the normal pilot light may be adjusted by turning the screw 38. To light either of the burners B or B, for example, finger piece or arm is grasped and the plug 26 with its tube 8 and firing head 9 are turned selectively into the dotted line position directed toward the burner which it is desired to light. Lever 40 is then depressed to unseat the valve 45, whereupon, the fuel supply to the firing head is increased through the open end 46 of the valve cage and a long slender jet of flame is projected to the desired burner to ignite the same, the air supply through the ports 20 along the axis of the jet aiding rather than impairing or distorting the projection as already pointed out.

1. As an article of manufacture, a tapered gas nozzle having an outlet opening at one end and enlarged toward and provided at its opposite end with an internally threaded base adapted to be. threaded directly upon a lighter tube and a single cup-shaped hood surrounding said nozzle and provided with an inclined wall fitting over and joined to said base, said inclined wall having air inlet openings disposed rearwardly of the outlet end of the nozzle and directing the air supplied thru said openings along the axis of joined to the base of said nozzle rearwardly of the forward end thereof, and said oblique end having air inlet openings disposed rearwardly of the forward outlet end of the nozzle and directed forwardly along the axis thereof, to give the air the general path of movement of the delivery from the nozzle before it encounters same.

In Witness whereof, I hereunto subscribe my name this 30th day of November, 1925,

OSCAR J. LEINS. 

